Each experimental period lasted 22 days: 15 days of adaptation to the new diets, followed by 7 days for measurements
(feed intake and milk yield) and sample collection. Feed intake was recorded daily by weighing the offered diets and refusals
from the previous day, and fecal grab samples were collected twice daily at 07:00 and 15:00 h, dried at 60 ◦C in a forcedair
oven for 48 h and pooled by goat within period. Acid insoluble ash was used as an internal indigestibility marker, and
coefficients of digestion calculated according to Ferret et al. (1999).